On Tue, Jul 05, 2022 at 08:49:26AM -0700, ira.weiny@xxxxxxxxx wrote: > From: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx> Possible subject: PCI/DOE: Add DOE mailbox support functions (no trailing period required) > Introduced in a PCIe r6.0, sec 6.30, DOE provides a config space based > mailbox with standard protocol discovery. Each mailbox is accessed > through a DOE Extended Capability. > > Each DOE mailbox must support the DOE discovery protocol in addition to > any number of additional protocols. > > Define core PCIe functionality to manage a single PCIe DOE mailbox at a > defined config space offset. Functionality includes iterating, > creating, query of supported protocol, and task submission. Destruction > of the mailboxes is device managed. > > Cc: "Li, Ming" <ming4.li@xxxxxxxxx> > Cc: Bjorn Helgaas <helgaas@xxxxxxxxxx> > Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx> > Co-developed-by: Ira Weiny <ira.weiny@xxxxxxxxx> > Signed-off-by: Ira Weiny <ira.weiny@xxxxxxxxx> Whenever the CXL folks are happy with this: Acked-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx> > +static int pci_doe_recv_resp(struct pci_doe_mb *doe_mb, struct pci_doe_task *task) > ... > + pci_err(pdev, > + "[%x] expected [VID, Protocol] = [%04x, %02x], got [%04x, %02x]\n", Since the string already wraps, I think there's no benefit to starting it on its own line. Joining with "pci_err(pdev, "[%x] ..." improves greppability slightly. > + pci_err(pdev, > + "[%x] busy detected; another entity is sending conflicting requests\n", > + offset); Ditto. > + * pci_doe_submit_task() - Submit a task to be processed by the state machine > ... > + * RETURNS: 0 when task has been successful queued, -ERRNO on error successfully > +int pci_doe_submit_task(struct pci_doe_mb *doe_mb, struct pci_doe_task *task) > ... > + * DOE requests must be a whole number of DW > + * and the response needs to be big enough for at least 1 DW Rewrap to fill 78 columns or so.
